RWBY Reboot & Blue Petal Reading Guide
As long as you've seen RWBY, this should be a fairly straightforward process of starting with the RWBY Reboot Series Prologue or with the RWBY Reboot Trailers. But, you can start from chronological order as well. To each their own!
Ozwald's Beginning (while there's typos in some places, such as a character's name that changed after the story was written, it sets up the beginning of The Grimm War and Ozwald's character as a whole)
After The War: Mini-Stories (already in chronological order, but mostly unfinished)
2.5. The Huntress And The Bandit (during After The War tales)
(RWBY Reboot series)
RWBY Reboot Volume 8
the rest of RWBY Reboot (not available on this site currently)
(Blue Petal series)
A Rose With Thorns (might have to skip here from RWBY Reboot Volume 7, as the rest is unfinished... don't worry, very few spoilers)
A War Of Wills (okay, some spoilers here)
After Blue Petal short stories (to be eventually released after book 6)
(???)
King Of The World (not finished)